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  <body><h3>C0 code coverage information</h3>
    <p>Generated on Sun Dec 07 18:01:50 -0800 2008 with <a href='http://github.com/spicycode/rcov'>rcov 0.8.1.5</a>
      </p>
    <hr/>
    <pre><span class='marked0'>Code reported as executed by Ruby looks like this...
</span><span class='marked1'>and this: this line is also marked as covered.
</span><span class='inferred0'>Lines considered as run by rcov, but not reported by Ruby, look like this,
</span><span class='inferred1'>and this: these lines were inferred by rcov (using simple heuristics).
</span><span class='uncovered0'>Finally, here&apos;s a line marked as not executed.
</span></pre>
<table class='report'><thead><tr><td class='heading'>Name</td>
      <td class='heading'>Total lines</td>
      <td class='heading'>Lines of code</td>
      <td class='heading'>Total coverage</td>
      <td class='heading'>Code coverage</td>
      </tr>
    </thead>
  <tbody><tr class='light'><td><a href='lib-lingua-en-readability_rb.html'>lib/lingua/en/readability.rb</a>
        </td>
      <td class='lines_total'><tt>143</tt>
        </td>
      <td class='lines_code'><tt>90</tt>
        </td>
      <td><table cellspacing='0' cellpadding='0' align='right'><tr><td><tt class='coverage_total'>54.5%</tt>
              &nbsp;</td>
            <td><table cellspacing='0' class='percent_graph' cellpadding='0' width='100'><tr><td class='covered' width='55'/>
                  <td class='uncovered' width='45'/>
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        </td>
      <td><table cellspacing='0' cellpadding='0' align='right'><tr><td><tt class='coverage_code'>27.8%</tt>
              &nbsp;</td>
            <td><table cellspacing='0' class='percent_graph' cellpadding='0' width='100'><tr><td class='covered' width='28'/>
                  <td class='uncovered' width='72'/>
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        </td>
      </tr>
    </tbody>
  </table>
<pre><span class="marked1"><a name="line1"></a>  1 module Lingua
</span><span class="marked0"><a name="line2"></a>  2 module EN
</span><span class="inferred1"><a name="line3"></a>  3 
</span><span class="inferred0"><a name="line4"></a>  4 # The class Lingua::EN::Readability takes English text and analyses formal
</span><span class="inferred1"><a name="line5"></a>  5 # characteristic
</span><span class="marked0"><a name="line6"></a>  6 class Readability
</span><span class="marked1"><a name="line7"></a>  7 	require 'lingua/en/syllable'
</span><span class="marked0"><a name="line8"></a>  8 	require 'lingua/en/sentence'
</span><span class="inferred1"><a name="line9"></a>  9 	
</span><span class="marked0"><a name="line10"></a> 10 	attr_reader :text, :paragraphs, :sentences, :words,  :frequencies
</span><span class="inferred1"><a name="line11"></a> 11 	
</span><span class="inferred0"><a name="line12"></a> 12 	# The constructor accepts the text to be analysed, and returns a report
</span><span class="inferred1"><a name="line13"></a> 13 	# object which gives access to the 
</span><span class="marked0"><a name="line14"></a> 14 	def initialize(text)
</span><span class="uncovered1"><a name="line15"></a> 15 		@text                = text.dup
</span><span class="uncovered0"><a name="line16"></a> 16 		@paragraphs          = text.split(/\n\s*\n\s*/)
</span><span class="uncovered1"><a name="line17"></a> 17 		@sentences           = Lingua::EN::Sentence.sentences(@text)
</span><span class="uncovered0"><a name="line18"></a> 18 		@words               = []
</span><span class="uncovered1"><a name="line19"></a> 19 		@frequencies         = {}
</span><span class="uncovered0"><a name="line20"></a> 20 		@frequencies.default = 0
</span><span class="uncovered1"><a name="line21"></a> 21 		@syllables           = 0
</span><span class="uncovered0"><a name="line22"></a> 22 		@complex_words       = 0
</span><span class="uncovered1"><a name="line23"></a> 23 		count_words
</span><span class="uncovered0"><a name="line24"></a> 24 	end
</span><span class="inferred1"><a name="line25"></a> 25 	
</span><span class="inferred0"><a name="line26"></a> 26 	# The number of paragraphs in the sample. A paragraph is defined as a 
</span><span class="inferred1"><a name="line27"></a> 27 	# newline followed by one or more empty or whitespace-only lines.
</span><span class="marked0"><a name="line28"></a> 28 	def num_paragraphs
</span><span class="uncovered1"><a name="line29"></a> 29 		@paragraphs.length
</span><span class="uncovered0"><a name="line30"></a> 30 	end
</span><span class="inferred1"><a name="line31"></a> 31 	
</span><span class="inferred0"><a name="line32"></a> 32 	# The number of sentences in the sample. The meaning of a &quot;sentence&quot; is
</span><span class="inferred1"><a name="line33"></a> 33 	# defined by Lingua::EN::Sentence.
</span><span class="marked0"><a name="line34"></a> 34 	def num_sentences
</span><span class="uncovered1"><a name="line35"></a> 35 		@sentences.length
</span><span class="uncovered0"><a name="line36"></a> 36 	end
</span><span class="inferred1"><a name="line37"></a> 37 	
</span><span class="inferred0"><a name="line38"></a> 38 	# The number of characters in the sample.
</span><span class="marked1"><a name="line39"></a> 39 	def num_chars
</span><span class="uncovered0"><a name="line40"></a> 40 		@text.length
</span><span class="uncovered1"><a name="line41"></a> 41 	end
</span><span class="marked0"><a name="line42"></a> 42 	alias :num_characters :num_chars
</span><span class="inferred1"><a name="line43"></a> 43 	
</span><span class="inferred0"><a name="line44"></a> 44 	# The total number of words used in the sample. Numbers as digits are not
</span><span class="inferred1"><a name="line45"></a> 45 	# counted.
</span><span class="marked0"><a name="line46"></a> 46 	def num_words
</span><span class="uncovered1"><a name="line47"></a> 47 		@words.length
</span><span class="uncovered0"><a name="line48"></a> 48 	end
</span><span class="inferred1"><a name="line49"></a> 49 	
</span><span class="inferred0"><a name="line50"></a> 50 	# The total number of syllables in the text sample. Just for completeness.
</span><span class="marked1"><a name="line51"></a> 51 	def num_syllables
</span><span class="uncovered0"><a name="line52"></a> 52 		@syllables
</span><span class="uncovered1"><a name="line53"></a> 53 	end
</span><span class="inferred0"><a name="line54"></a> 54 	
</span><span class="inferred1"><a name="line55"></a> 55 	# The number of different unique words used in the text sample.
</span><span class="marked0"><a name="line56"></a> 56 	def num_unique_words
</span><span class="uncovered1"><a name="line57"></a> 57 		@frequencies.keys.length
</span><span class="uncovered0"><a name="line58"></a> 58 	end
</span><span class="inferred1"><a name="line59"></a> 59 	
</span><span class="inferred0"><a name="line60"></a> 60 	# An array containing each unique word used in the text sample.
</span><span class="marked1"><a name="line61"></a> 61 	def unique_words
</span><span class="uncovered0"><a name="line62"></a> 62 		@frequencies.keys
</span><span class="uncovered1"><a name="line63"></a> 63 	end
</span><span class="inferred0"><a name="line64"></a> 64 	
</span><span class="inferred1"><a name="line65"></a> 65 	# The number of occurences of the word +word+ in the text sample.
</span><span class="marked0"><a name="line66"></a> 66 	def occurrences(word)
</span><span class="uncovered1"><a name="line67"></a> 67 		@frequencies[word]
</span><span class="uncovered0"><a name="line68"></a> 68 	end
</span><span class="inferred1"><a name="line69"></a> 69 	
</span><span class="inferred0"><a name="line70"></a> 70 	# The average number of words per sentence.
</span><span class="marked1"><a name="line71"></a> 71 	def words_per_sentence
</span><span class="uncovered0"><a name="line72"></a> 72 		@words.length.to_f / @sentences.length.to_f
</span><span class="uncovered1"><a name="line73"></a> 73 	end
</span><span class="inferred0"><a name="line74"></a> 74 	
</span><span class="inferred1"><a name="line75"></a> 75 	# The average number of syllables per word. The syllable count is performed
</span><span class="inferred0"><a name="line76"></a> 76 	# by Lingua::EN::Syllable, and so may not be completely accurate, especially
</span><span class="inferred1"><a name="line77"></a> 77 	# if the Carnegie-Mellon Pronouncing Dictionary is not installed.
</span><span class="marked0"><a name="line78"></a> 78 	def syllables_per_word
</span><span class="uncovered1"><a name="line79"></a> 79 		@syllables.to_f / @words.length.to_f
</span><span class="uncovered0"><a name="line80"></a> 80 	end
</span><span class="inferred1"><a name="line81"></a> 81 	
</span><span class="inferred0"><a name="line82"></a> 82 	# Flesch-Kincaid level of the text sample. This measure scores text based
</span><span class="inferred1"><a name="line83"></a> 83 	# on the American school grade system; a score of 7.0 would indicate that
</span><span class="inferred0"><a name="line84"></a> 84 	# the text is readable by a seventh grader. A score of 7.0 to 8.0 is
</span><span class="inferred1"><a name="line85"></a> 85 	# regarded as optimal for ordinary text.
</span><span class="marked0"><a name="line86"></a> 86 	def kincaid
</span><span class="uncovered1"><a name="line87"></a> 87 		(11.8 * syllables_per_word) +  (0.39 * words_per_sentence) - 15.59
</span><span class="uncovered0"><a name="line88"></a> 88 	end
</span><span class="inferred1"><a name="line89"></a> 89 	
</span><span class="inferred0"><a name="line90"></a> 90 	# Flesch reading ease of the text sample. A higher score indicates text that
</span><span class="inferred1"><a name="line91"></a> 91 	# is easier to read. The score is on a 100-point scale, and a score of 60-70
</span><span class="inferred0"><a name="line92"></a> 92 	# is regarded as optimal for ordinary text.
</span><span class="marked1"><a name="line93"></a> 93 	def flesch
</span><span class="uncovered0"><a name="line94"></a> 94 		206.835 - (1.015 * words_per_sentence) - (84.6 * syllables_per_word)
</span><span class="uncovered1"><a name="line95"></a> 95 	end
</span><span class="inferred0"><a name="line96"></a> 96 	
</span><span class="inferred1"><a name="line97"></a> 97 	# The Gunning Fog Index of the text sample. The index indicates the number
</span><span class="inferred0"><a name="line98"></a> 98 	# of years of formal education that a reader of average intelligence would
</span><span class="inferred1"><a name="line99"></a> 99 	# need to comprehend the text. A higher score indicates harder text; a value
</span><span class="inferred0"><a name="line100"></a>100 	# of around 12 is indicated as ideal for ordinary text.
</span><span class="marked1"><a name="line101"></a>101 	def fog
</span><span class="uncovered0"><a name="line102"></a>102 	  ( words_per_sentence +  percent_fog_complex_words ) * 0.4
</span><span class="uncovered1"><a name="line103"></a>103 	end
</span><span class="inferred0"><a name="line104"></a>104 	
</span><span class="inferred1"><a name="line105"></a>105 	# The percentage of words that are defined as &quot;complex&quot; for the purpose of
</span><span class="inferred0"><a name="line106"></a>106 	# the Fog Index. This is non-hyphenated words of three or more syllabes.
</span><span class="marked1"><a name="line107"></a>107 	def percent_fog_complex_words
</span><span class="uncovered0"><a name="line108"></a>108 		( @complex_words.to_f / @words.length.to_f ) * 100
</span><span class="uncovered1"><a name="line109"></a>109 	end
</span><span class="inferred0"><a name="line110"></a>110 	
</span><span class="inferred1"><a name="line111"></a>111 	# Return a nicely formatted report on the sample, showing most the useful
</span><span class="inferred0"><a name="line112"></a>112 	# statistics about the text sample.
</span><span class="marked1"><a name="line113"></a>113 	def report
</span><span class="uncovered0"><a name="line114"></a>114 		sprintf &quot;Number of paragraphs           %d \n&quot; &lt;&lt;
</span><span class="uncovered1"><a name="line115"></a>115 				&quot;Number of sentences            %d \n&quot; &lt;&lt;
</span><span class="uncovered0"><a name="line116"></a>116 				&quot;Number of words                %d \n&quot; &lt;&lt;
</span><span class="uncovered1"><a name="line117"></a>117 				&quot;Number of characters           %d \n\n&quot; &lt;&lt;
</span><span class="uncovered0"><a name="line118"></a>118 				&quot;Average words per sentence     %.2f \n&quot; &lt;&lt;
</span><span class="uncovered1"><a name="line119"></a>119 				&quot;Average syllables per word     %.2f \n\n&quot; &lt;&lt;
</span><span class="uncovered0"><a name="line120"></a>120 				&quot;Flesch score                   %2.2f \n&quot; &lt;&lt;
</span><span class="uncovered1"><a name="line121"></a>121 				&quot;Flesh-Kincaid grade level      %2.2f \n&quot; &lt;&lt;
</span><span class="uncovered0"><a name="line122"></a>122 				&quot;Fog Index                      %2.2f \n&quot;,
</span><span class="uncovered1"><a name="line123"></a>123 				num_paragraphs, num_sentences, num_words, num_characters,
</span><span class="uncovered0"><a name="line124"></a>124 				words_per_sentence, syllables_per_word,
</span><span class="uncovered1"><a name="line125"></a>125 				flesch, kincaid, fog
</span><span class="uncovered0"><a name="line126"></a>126 	end
</span><span class="inferred1"><a name="line127"></a>127 	
</span><span class="marked0"><a name="line128"></a>128 	private
</span><span class="marked1"><a name="line129"></a>129 	def count_words
</span><span class="uncovered0"><a name="line130"></a>130 		for match in @text.scan /\b([a-z][a-z\-']*)\b/i
</span><span class="uncovered1"><a name="line131"></a>131 			word = match[0]
</span><span class="uncovered0"><a name="line132"></a>132 			@words.push word
</span><span class="uncovered1"><a name="line133"></a>133 			@frequencies[word] += 1
</span><span class="uncovered0"><a name="line134"></a>134 			syllables = Lingua::EN::Syllable.syllables(word)
</span><span class="uncovered1"><a name="line135"></a>135 			@syllables += syllables
</span><span class="uncovered0"><a name="line136"></a>136 			if syllables &gt; 2 &amp;&amp; word !~ /-/
</span><span class="uncovered1"><a name="line137"></a>137 				@complex_words += 1 # for Fog Index
</span><span class="uncovered0"><a name="line138"></a>138 			end
</span><span class="uncovered1"><a name="line139"></a>139 		end
</span><span class="uncovered0"><a name="line140"></a>140 	end
</span><span class="uncovered1"><a name="line141"></a>141 end
</span><span class="uncovered0"><a name="line142"></a>142 end
</span><span class="uncovered1"><a name="line143"></a>143 end
</span></pre><hr/>
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